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Simplifying 28(u + -1) + (3u + 8) = 9(28) Reorder the terms: 28(-1 + u) + (3u + 8) = 9(28) (-1 * 28 + u * 28) + (3u + 8) = 9(28) (-28 + 28u) + (3u + 8) = 9(28) Reorder the terms: -28 + 28u + (8 + 3u) = 9(28) Remove parenthesis around (8 + 3u) -28 + 28u + 8 + 3u = 9(28) Reorder the terms: -28 + 8 + 28u + 3u = 9(28) Combine like terms: -28 + 8 = -20 -20 + 28u + 3u = 9(28) Combine like terms: 28u + 3u = 31u -20 + 31u = 9(28) Multiply 9 * 28 -20 + 31u = 252 Solving -20 + 31u = 252 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 31u = 252 + 20 Combine like terms: -20 + 20 = 0 0 + 31u = 252 + 20 31u = 252 + 20 Combine like terms: 252 + 20 = 272 31u = 272 Divide each side by '31'. u = 8.774193548 Simplifying u = 8.774193548
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